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发明名称
écouteurs téléphoniques à haute fréquence
摘要
申请公布号
FR914880(A)
申请公布日期
1946.10.21
申请号
FRD914880
申请日期
1945.04.20
申请人
发明人
ABADIE JEAN-BAPTISTE-JOSEPH
分类号
H04R9/10
主分类号
H04R9/10
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代理人
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